Shaking and screening apparatus



April 2, 1929- M. o. cED ER'Qulsr 1,707,251

SHAKING AND SCREENING APPARATUS Fileq Feb. 25, 1927 2 Sheets-Sheet 1April 1929- M. o. CEDERQUIST 1,707,251

SHAKING AND SCREENING APPARATUS FiledfFeb. 23, 1927 I 2 Sheets-Sheet 2 VI i E D? [I5 4. i7 E 33 50 32 V amwxmw Patented Apr. 2, 1929.

MILTON o. GEDERQUIS'T, on BUFFALO, NEW YORK.

SHAKING AND SGREENING APPARATUS.

Application filed February 23, 1927. Serial No. 170,174.

This invention relates to screeningappa: ratus ottho kin-din which thescreening oi:

the material is assisted by a shaking or 1nove-' merit of the screeningdevice or member.

The objects of thisinvention are to orovide a screening and shakingapparatus oi simple and eliicieirt construction which so made that themovable grating members of the ap paratus may be readily removed andreplaced bv others so that the apparatus may he read ily adapted forscreening ditlerent sizes o'li materials; also to construct an apparatusof this kind. in such a manner tliat all the bean ting surfaces are soarranged that they are not exposed to the material which is being so'cened; also to provide means t improved uction for impartingoscillatory movement in dili'erent directions to alternately arrangedbars or men'ibers; also to improve the construction of devices of thiskind in other respects hereinafter specified.

in the accompanying drawings, h

hi I a side elevation of a shaking and screening apparatus on'ihodyingthis invention. i

Fig. 2 is atop plan View thereof;

Figs. 0 and 4t are agmientary,longitudisectional elevations thereof,showing the Off the apparatus in different positions. his. 5 is afragmentary, transverse, section l elevation thereof on line 5+5, Fig; r1g. 6 a rfragmentary side elevation thcreo' on. line (3-($, 2.

7 is a tragmentaiy, sectional plan view cot on line i 7., Flog; 5.

Fla, 5% is a .t'r; 'ienlary, transverse see tionzil ole-ration i, reapparatus, showing the apps; lns rise-d tor shaking: a screen.

9 is a siuiilar View thereof showh igthe par thereof in dii'l'ereutpositions. L

A and Al represent the side wallsot the apparatus Whi ch may bemade ofmetal or oi any other suitable material an d on Which the parts oi thezpparatus are preterably sup ported. These Walls are spaced apart sothat the material to be screened or otherwise acted upon passes betweenthetwo side walls and upon the inclined screening or grating surhicearranged between these Walls.

lho mechanism for imparting movement or tor shal-iinp; thoscreeninp; orgrating suriaeo pro-l" ably includes a plnrality of oscillatory frames,each including a P811 of cross liars extending traniwerscly of thescreening apparatusy the ends of the cross bars being connected withoscillatory members or disks mounted respectively on the side Walls A Ain anysuitahle or desired manner. Preferably the mechanism for impartingmovement to the oscillatory or shaking -frames is mounted on the outerfaces of the Walls A and A so as to be protected from the material Whichis being; acted upon. In the particular construction shown theoscillatory end members or disks of the frames are arranged in twopairs, one pair B, B bcingarrange'd near the upper rear Jortion oi theside Walls and the other pair ll", 13 being arranged near the lowerfront or discharge portion ocl' the Walls, so that the screening surfacemay be arranged at an inclination, but it will he understood that anydesired number of shaking or oscillating frames may be employed, ifdesired. Each of these oseillatory cnd menxbers as shown is in the formof adisk or Wheel having flanges 14 and is mounted on a pair of rollers15, \vhich arespaoed apart and the peripheral portions of which extendbetween the flanges 14 ot the-disks B, J". The rollers 15 aresuitablymountedon studs or axles 16 secured on brackets securedto theouter faces of the side Walls oft-he apparatus in any desired manner.Oscillatory motion may be imparted to the oscillatory end members ordisks B, B in any suitable or desired manner. in theparticularconstruction shown an eccentric C is provided mounted on a rotary sha ttlgandthe eccentric strap 20 thereof is connected through a connectingrod or pitman 521 \vith an arm 22 extending outwardly tronrthe upperoscillatory member or di 'ikli. The lower oscillatory member or dk B,which is preferably. identical in cons auction with the upper one, hasits arm 22 connected W ith the correspon din g arm of the upper disk oroscillatory end member by means of a connecting rod 24, the ends ofwhich are pivotally connected with thetwo arms of the oscillatory disks.Consequently the rotation of the eccentric C will impart oscillatorymoven'ientto the upper oscillatory member or disk through the pitman 21and similar moven'ient is imparted to the lower oscillatory memberordisk by the connecting rod 24. The oscillatory members or disks 1% andat the op posits side Off the apparatus may be actuated m a similarmanner by another eccentric preterably also mounted on the shaft 19. Theparticular pivotal mounting for the end nien'ibers or disks 1%, BQB and58 shown in the drawings, as well as the means for imparting oscillatorymotion thereto are shown only for purposes of illustration and it is notintended to limit the invention to the particular'constructions shown. Ie

The disks B, B and B B of each pair are connected by meansof a pair. oftransverse bars D, D which extend through the side Walls A, A andcrosswise of the apparatus, and the ends of these cross bars aresuitably Journalledin the oscillatory disks at opposite sides of theapparatus, eccentric to'the axes of rotation thereof and toward oppositesides of theoccnter or axis of rotation of the disks. Consequently theoscillatory disks B, Bfand B B and the cross bars or members i D, Dconnected therewith constitute shaking frames, and as the disks areosc'illatedthe cross bars or members D, D will move in oppositedirections in arcs of circles concentric about the axis of rotation ofthe oscillatory disks or end members of the trainee.- The cross bars, asshown, extend through slots 25 in'the side 'walls A, A and these slotsmay he closed by suitable movable closing members (not shown).

:Thecross bars-D, D may be of any shape but are'preferably square or ofother polygonal cross sectional shape throughout the major portions oftheir lengths as lndicated at 27, and the end portions 28 may, forconvious'that the greater part of the weight of the-material beingscreened is alternately supported or partly supported by alternate crossbars, and theaetion of the cross bars is such that when the weightisxsupported on one set of cross bars and lowered by the downwardmovementof these cross bars, it. comes into (contact with the other setof upwardly moving cross bars, with the result that when the downwardlymoving load on the cross bars is engaged bythe upwardly moving crossbar's, approximately twice the shock or impactis given to the load thanwould be the case f the upwardly moving cross bars CZLHIGinto"contactwith the loadwhile the load is stationary or at rest.Consequently the aparana described is very efficient in its action andimpartsa decided shaking to the material which'iisbeing scre'enec.

The screening or grating surface illustrated 1n the drawings andsupported on the cross bars comprises a plurality of grating members orbars E, E alternately arranged, the alternate grating bars E beingconnected. to the upper and lower oscillating cross bars D, and thegrating bars or member E being connected to and supported by the otheroscillating cross bars D. The grating members are preferably so mountedon the cross bars as to be easily removable and replaceable, and forthis purpose the grating members lil are provided with downwardlyextending cross bar engaging hooks or saddle members 30, which are soformed as to engage three sides of the square portions 27 of the crossbars I). These hooked portions are prei? erably arranged sullicientlybelow the body portions 31 of the bars E to allow ample room for themovement of the cross bars 1) relatively to the grating bars 15.Similarly the grating bars E are provided with downwardly extendingsupporting books or saddle members 32 which are substantially similar inconstruction to the parts 30 of the bars E but are arranged to engagewith the cross bars D. These supporting saddle parts or hooked portions82 also extend suliicicntly below the body portions of the grating barsE so as to allow ample movement of the cross bars D relatively to thegrating bars E. E, E may, if desired be provided with flanges 33 of anydesired width depending upon the spaces desired between the gratingbars, or, if desired, these upper flanges may be omitted.

In order to properly space the down ardly extending supporting parts orsaddle members 30 and 32 of the grating bars, lengthuise of thetransverse or cross bars D, D, suitable spacing meinbers 35 may beprovided which are substantially of channel. or U-sha-po in form and areadapted to iit over the cross bars D, D and to engage at least portionsof three sides of these cross bars. Preferabli the spacing members 35are so arranged on each cross bar as to engage one sidiof a cross barwhich is not engaged by the hooked or supporting portions 80 or 32.'lhese spin-- ing members may be of any desired length, depending uponthe spaces desired between adjacent grating bars, and the spacingmemhers 35 may be simply placed over the cross bars and held in placethereon by gravity. It w'll be understood that the material to bescreened is placed on top of the upper surfaces of the grating bars, andthe size of the screenings depends upon the spaces between adjacentgrating bars. These spacing members may, if desired, be formed integralwith the grating bars, for example, by increasing the width of the hookshaped portions 30 and 32. Since the screening surface is arranged at aninclination as shown in Fig. 1. the hooked or saddle portions 30 and 82of the grating bars as well as the spacing members 35 will be held inplace on the cross bars by The upper portions of each of the bars SidlllU

llo

Fall

a rmen gravity. When it is desired to remove a a 1- ing member it isonly necessary to move the same haclnval'dly and upwardly at an inclination to disengage the saddle or hooked portions or 32 thereof from thecross members and this disengagement Will not interfere With the spacingmembers 35 "when they are set as indicated in the drawings. Consequently grating bars which have become damaged or Worn can be readilyreplaced by others. By providin bearin at the ends of the cross bars,there will he no relative movement, between the cross bars and thespacing members supported thereby, and consequently no Wear on theportioi s of the cross bars which are engaged by the hooked portions ofthe grab ingr bars, nor on these hooked portions.

In the use of the appa 'atus, the material to be screened is fed to theupper ends of the incline: grating bars E, E and because of the movementimparted thereto by the cross bars, a thorough agitation or shaking ofthe n'laterial on the grating hers is effected. By arranging the bars sothat alternate bars move in opposite directions, the packing of thematerial between the grating bars is entirely prevented, so that thescreen self cleaning.

li he/n it is desired to use the apparatus in connection with thescreening of line materials or small particles, a screen member F may beemployed as shown in 8 and 9, which may be stretched across the space between the two side Walls A, A of the ap iaratus, and, if desired, theside edges of the screen member may he seclired to the side 11115 bymeans of clanniing bars 36ers shown. in a case of this kind the gratingbars F, E Would-serve merely to shake the screen F to facilitate thepassage of the material therethrou This shaking elliected by raising andlowering; portions of the screen by means of the alternate grating bars,or, if desired, the screen F may he so supported above the tire-tingbars that the gratin bars merely in i 7 contact the same during;portions of the movement thereof. It is, of course, possible as hasalready been stated to cause the cross bars ll, l) to act directly uponthe screen F by omitting the grating;- bare n], E, but When the grating;bars are used, as shown, substantially all parts of the screen areuniformly shaken.

lVhile the apparatus described is primarily intended for use inconnection with the screening of materiz-ils, yet it will be obviousthat the construction described may be used in connection with shakinggrates for furnaces.

I claim as my invention i l. A. shaking; and SUXOQHlllEZ apparatusincluding a plurality of oscillatory frames, each including; oscillatoryend nienil'iers and a pair of cross bars extending between andconnecting; said end members opposite sides of the axes of oscillationthereof, and

nalled In. said end members, grating bars hav hooldentensionsnoi-rotatablygr1p- L) pm said cross bars to upport saidgrating bars on said cross bars m. rout rotation there on, some of ca idgrating bars being; connected with cross ha] arranged at one side of theaxes ofoscillation of said frames and the other grating barsbeingconnected With remaining cross bars.

3. A shaking an d screening apparatus including a plurality ofoscillatory frames, each includin oscillatory end members and a pair ofcan is connecting said end menihers at opposite sides of the axis ofoscillation thereof, grating bars having hooked entensions sliding overand eripaqing three of each of said cross bars of a pair, some of saideating bars being connected with cross bars arranged at one side of theaxes of oscillation of said frames and the remaining 'ating bars beingconnected with the other cross bars, and spacers mounted on said barsfor spacing said grating bars fron'i each other.

l. A shaking and screening apparatus including a plurality ofoscillatory frames, each incl ud lug oscillatory end members and a pairof cross bars connecting said end inems at opposite sides of the axes ofoscillation thereof, grating bars having hooked extensions for engagingsaid cross bars, some of said grating bars being connected with crossbars arranged at one side of the axes ofoscillation or said frames andthe remaining grating: bars being connected with the other cross bars,and tl-shaped spacin members on said cross bars for spacing; saidgit-ating bars from each other A shakiilig; and screening}; apparatusinclut n52; a plurality of oscillatory frames,

each. includingoscillatory end members and a pair of cross barscomiecting said end n1e1nhers at opposite sides of the axis OfOSGillt1-tion thereof, grating; bars supported on said cross bars each gratingbar having USllllPQLl portions embracing three sides of each cross barupon which it is supported, alternate grratii'nr bars being connectedwith one cross bar of each frame and the remaining nf-ating bars being);connected With the other cross bars, and U haped spacing membersre1novably mourned on said cross bars, each. menr her einhracin threesides of the cross bar on Which it is mounted and including the face notembraced by the grate bars mounted on thatcross-bar and spacingalternate grating bars from each other. 1

6. -A shaking and screening apparatus including side walls, a pluralityof oscillatory frames, each including a pair of cross members extendingthrough apertures in said side Walls and across the space between saidside walls, and oscillatory end members in which the ends of said crossbars are iournalled,

means arrangedrexterior to said side walls for 1ournall1ng saidoscillatory end members, and gratlng bars having slotted portionslit-ted. over and removably supported on said cross bars, said gratingbars gr ppmg said cross bars to prevent turnlng of the latter relativelyto said grating bars, said alternate 1 of the axes of rotation of saiddisks, grating bars extending transversely of said cross bars, eachgrating bar having depending portions non-rotatably and reinovablyinterlockingwith a cross bar of each pair of disks whereby any bar maybe separately removed from the cross bars independently of the others,one group of. grating bars being connected to one cross bar of eachdisk, the other group of grating bars being connected to the other crossbar, whereby when said disks are oscillated, said cross bars will causealternate rise and fall of the groups of grating bars, andmeans foroscillating said disks.

'8. Ashakingand screening apparatus incl riding a plurality ofoscillatory frames, each frame including alined oseillatory end membersand a pair ofcross bars connecting said alined end member-sat oppositesides ofthe axis of oscillation thereof, said cross bars beingjournalled in the end members, grating bars extending transversely ofthe cross bars 1 and between said frames, each grating bar havingdepending portions slid ably and nonrotatably engaging a cross bar ofeach frame by the descent of said grating bars towards said cross bars,one group of said grating bars "being connected to one cross bar of eachof said frames, theother group of grating bars being connected to theother of said cross bars and interposed-between the bars of said firstmentioned group, and. means for oscillating said frames'tocausealternate, concomitant,

' opposite vertical movements of said groups of grating bars.

, ;9. A shak ng and screening apparatus 1neluding a pair of oscillatoryframes, each frame including oscillating end disk members and a pair ofcross bars extending between and connecting said end members at oppositesides of the axis of oscillation thereof, rollers on which said diskmembers are mounted for oscillation, and. grating bars disposed atspaced agart intervals, one group of grating bars extending between onecross bar of both frames the other group of grating bars extendingbetween the other cross bars, whereby when said frames are oscillatedcertain sections of the surface formed by said grate bars will risewhile the remaining sections will fall u1cO1uitunl'l and alternate inthe rise and fall movements during successive oscillations of saidframes.

10. A shaking and screening apparatus ineluding a plurality ofoscillatory frames, each frame including oscillatory end members and apair of cross bars connecting said end members at opposite sides of theaxes of oscillation thereof, said axes being arranged in an inclinedplane, said cross bars being journalled in said end mcnrbcrs and havingnoncireular portions intermediate said members, grating bars extendingbetween said frame members over said cross bars and having dependingportions with lateral slots movable into embraced relation with saidnon-circular intermediate portions of the cross bars. with the opensides of the slots extending down said inclined plane, one group of saidgrating bars being mounted on one cross bar of both frames, the othergroup of grating bars being mounted on the other cross bars of bothframes, and means for oscillating said frames to cause alternate risingand falling of said sets of grating bars.

11. A shaking and screening apparatus including a plurality ofoscillatory frames, each frame including oscillatory end members and apair of cross bars connecting said end members at opposite sides of theaxes of oscillation thereof, said axes being arranged in an inclinedplaie, said cross bars being journalled in said end members and havingnon-circular portions intermediate said members grating bars extendingbetween said frame mcn'ibers over said cross bars and havingde iiendingportions with lateral slots movable into embraced relation with saidnon-circular intermediate portions of the cross bars, with the opensides of the slots extending down said inclined plane. one group of saidgrating bars being mounted on one cross bar of both frames, the othergroup of grating bars being mounted on the other cross bars of bothframes, means for oscillating said frames to cause alternate rising andfalling of said sets of grating bars, and U-shaped spacer members fittedover said cross bars between said grating bars, wluch are mountedthereon, for holding the latter in spaced relation to one another, saidspacer elements also non-rotatably engaging said cross bars and beingfitted thereon by descent over the same.

12. A shaking and screening apparatus including a plurality ofoscillatory trainee, each including oscillatory end members and a pairof cross bars connecting said end members at opposite sides of the axesof osciliation thereof grating; bars extending between said frames andhaving depending portions e11- gageable with a cross bar of eachtt'ran'ie, part oi said grating bars being carried by one cross bar ofboth frames the other grating bars being; carried by the other bars ofsaid frames whereby said grating bars will be caused to alternatr-ilyrise and fall upon oscillation of said frames, part of said grating barsrising While the others are falling and vice versa, and a screeningdevice disposed above said grating; bars in a position to be struck andagitated by the rising grating bars.

13. A sl airing; and screening apparatus i11- cluding a plurality ofoscillatory frames, each including oscillatory end members and a pair ofcross bars connecting said end members at opposite sides of the axes ofoscillation there-- of, grating bars extending between said frames andhaving depending portions engageable With a cross bar of each frame,part of said grating bars being; carried by one cross bar of bothframes, the other grating bars being carried by the other bars of saidframes, whereby said grating bars will be caused to alternately rise andfall upon oscillation of said frames, part ol said grating bars risingwhile the others are falling and vice versa, and a screening devicedisposer abet-"e said grating bars in a position to be struck andagitated by the rising grating bais said cross bars being journalled attheir ends in said end members, and said end Ineinbers being: disposedbeyond the lateral lirn its oi said screening device, whereby thematerial being screened Will not interfere With the bearings of saidframes or cross bars.

14L. A. shaking and screening apparatus including a mesh screen, and anagitating device: therefor and disposed beneath the same, id devicecomprising alined oscillatory :[rame members cross bars exteadingbetweenand connecting said members for oscillations tllfilQWitill, interponentelements disposed between said screen and c1? bars tor transferringmovement of the cross bars to said screenw and means by which said framemem here may be oscillated.

MILTON O. GEDERQULT.

